'We anticipate filing two INDs early this summer: HS-130, the first dual-acting immunotherapy designed to deliver local T-cell activation and co-stimulation, as well as PTX-35, our first-in-class T cell costimulator antibody. We recently presented a poster at the American Association for Cancer Research (AACR) Annual Meeting, in which we reported efficacy in a mouse model, demonstrating that the combination of HS-110 with OX40L co-stimulation has the potential to dramatically enhance anti-tumor immune responses via the activation and expansion of CD8+, tumor antigen-specific, T effector cells. We also remain encouraged by the preliminary pre-clinical efficacy and safety data of PTX-35, which show activity with a favorable safety profile across a wide range of doses.'

'We ended the quarter with approximately $23.5 million of cash, cash equivalents and short-term investments. We expect to receive an additional $6.9 million in grant funds from Cancer Prevention Research Institute of Texas (CPRIT) after filing our IND for PTX-35.'

First Quarter 2019 Financial Results

Recognized $0.7 million of grant revenue for qualified expenditures under the CPRIT grant.

Research and development expenses increased to $3.2 million for the quarter ended March 31, 2019 compared to $2.9 million for the quarter ended March 31, 2018. The $0.3 million increase is due to the increased enrollment in the Phase 2 portion of our multi-arm NSCLC clinical trial, stock-based compensation, and the PTX expense as we continue pre-clinical development of the PTX-35 program.

General and administrative expenses were approximately $3.3 million for the quarter ended March 31, 2019 compared to $1.8 million for the quarter ended March 31, 2018. The $1.6 million increase is primarily attributable to increased stock-based compensation expense.

Net loss attributable to Heat Biologics was approximately $5.7 million, or ($0.17) per basic and diluted share for the quarter ended March 31, 2019 compared to a net loss of approximately $3.3 million, or ($0.71) per basic and diluted share for the quarter ended March 31, 2018.

As of March 31, 2019, the Company had approximately $23.5 million in cash, cash equivalents and short-term investments.

About Heat Biologics, Inc.

Heat Biologics is a biopharmaceutical company developing immunotherapies designed to activate a patient's immune system against cancer using CD8+ 'Killer' T-cells. Our T-Cell Activation Platform (TCAP) produces therapies designed to turn 'cold' tumors 'hot' and be administered in combination with checkpoint inhibitors and other immuno-modulators to increase their effectiveness. HS-110 is our first biologic product candidate in a series of proprietary immunotherapies designed to stimulate a patient's own T-cells to attack cancer. Our ComPACT technology is a dual-acting immunotherapy designed to deliver T-cell activation and co-stimulation in a single product. We are currently enrolling patients in our Phase 2 clinical trial for advanced non-small cell lung cancer, in combination with Bristol-Myers Squibb's nivolumab (Opdivo) or Merck's anti-PD1 checkpoint inhibitor pembrolizumab (KEYTRUDA). Pelican Therapeutics, a subsidiary of Heat, is focused on the development of co-stimulatory monoclonal antibody and fusion protein-based therapies designed to activate the immune system. We also have numerous pre-clinical programs at various stages of development. For more information, please visit www.heatbio.com.

Forward Looking Statements

This press release includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 on our current expectations and projections about future events. In some cases, forward-looking statements can be identified by terminology such as 'may,' 'should,' 'potential,' 'continue,' 'expects,' 'anticipates,' 'intends,' 'plans,' 'believes,' 'estimates,' and similar expressions. These statements are based upon current beliefs, expectations and assumptions and include statements such as the addition of HS-110 to nivolumab may restore anti-tumor activity in patients whose disease has progressed after checkpoint inhibitor therapy, completion of enrollment in the Phase 2 trial later in the quarter and releasing data later in the year, the anticipated filing of two INDs early this summer, HS-130 being the first potential dual-acting immunotherapy designed to deliver T-cell activation and co-stimulation in a single product; the combination of HS-110 with OX40L co-stimulation having the potential to dramatically enhance anti-tumor immune responses, and the expected receipt of an additional $6.9 million in grant funds from Cancer Prevention Research Institute of Texas (CPRIT) after filing our IND for PTX-35. These statements are based on management's expectations and assumptions as of the date of this press release and are subject to a number of risks and uncertainties, many of which are difficult to predict that could cause actual results to differ materially from current expectations and assumptions from those set forth or implied by any forward-looking statements, including the ability of Heat's therapies to perform as designed, to demonstrate safety and efficacy, as well as results that are consistent with prior results, the ability to enroll patients and complete the clinical trials on time and achieve desired results and benefits, Heat's ability to obtain regulatory approvals for commercialization of product candidates or to comply with ongoing regulatory requirements, regulatory limitations relating to Heat's ability to promote or commercialize its product candidates for specific indications, acceptance of its product candidates in the marketplace and the successful development, marketing or sale of products, Heat's ability to maintain its license agreements, the continued maintenance and growth of its patent estate, its ability to establish and maintain collaborations, its ability to obtain or maintain the capital or grants necessary to fund its research and development activities, its ability to retain its key scientists or management personnel, and the other factors described in Heat's Annual Report on Form 10-K and 10-K/A for the year ended December 31, 2018 and other filings with the SEC. The information in this release is provided only as of the date of this release and the company undertakes no obligation to update any forward-looking statements contained in this release based on new information, future events, or otherwise, except as required by law.